repulsivepolaronsinonedimensionalfermigases

	repulsivepolaronsinonedimensionalfermigases
	Song Yadong; Barthwal Sachin
刊名	communicationsintheoreticalphysics
	2019
卷号	71 期号:5 页码:617
ISSN号	0253-6102
英文摘要	Using the variational method, we study the properties of a spin-down impurity immersed in a one-dimensional (1D) spin-up Fermi sea. With repulsive interactions between them, the impurity is dressed up by surrounding particles in Fermi sea and forms a polaron. We clearly calculate the binding energy, effective mass, momentum distribution, Tan contact, and pair correlation. Even in strong repulsive regimes, the results can agree with the exact Bethe Ansatz results. The repulsive polaron energy E+ is below Fermi energy E-F and no negative effective masses are found in whole interaction regimes, unequal masses polarons are also calculated. We show a clear momentum distribution and calculate the Tan contact from three different aspects. Furthermore, we explore the particle-hole excitation and find that the hole terms in Fermi sea have a great influence on the polaron energy and contact in repulsive regime. These results show that the variational method can still be used effectively in 1D repulsive polaron system.
资助项目	[National Natural Science Foundation of China]
语种	英语
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/16757]
专题	中国科学院武汉物理与数学研究所
作者单位	中国科学院武汉物理与数学研究所
推荐引用方式 GB/T 7714	Song Yadong,Barthwal Sachin. repulsivepolaronsinonedimensionalfermigases[J]. communicationsintheoreticalphysics,2019,71(5):617.
APA	Song Yadong,&Barthwal Sachin.(2019).repulsivepolaronsinonedimensionalfermigases.communicationsintheoreticalphysics,71(5),617.
MLA	Song Yadong,et al."repulsivepolaronsinonedimensionalfermigases".communicationsintheoreticalphysics 71.5(2019):617.